betrayal

n. /bɪˈtreɪəl/ C1

背叛；背信弃义

The act of not being loyal to someone who trusts you.

仙境例句

Stealing the Queen's own tarts was a betrayal, and the Knave knew it.

偷王后亲手做的馅饼是一种背叛，红桃杰克心里也明白。